refactor(confidence-engine): make episode preparation server-owned

components/scenario-form.jsx

@@ -6,7 +6,6 @@ import DiagnosticsView from "@/components/diagnostics-view";
 import ReasoningWorkspace, { LoadingOverlay, ContinueLaterBanner } from "@/components/reasoning-workspace";
 import { mockFetch, AVAILABLE_SCENARIOS } from "@/lib/mocks/confidence-engine/mock-client";
 import { deriveFindingsFromContributions, normalizeFindings } from "@/lib/graph/finding-helpers";
-import { prepareCompletedEpisode } from "@/lib/graph/episode-preparation.js";
 import { loadInvestigation, saveInvestigation, clearInvestigation } from "@/lib/storage/investigation-storage";
 
 /* Compile-time env resolution — NEXT_PUBLIC_ vars are injected by Next.js at build */
@@ -249,22 +248,10 @@ export async function executeEpisodeDone({
   targetNodeId,
   focusedContributions,
   findings,
-  prepareCompletedEpisode: prepFn = prepareCompletedEpisode,
   episodeDoneServer,
   synthesizeFn,
   setResult: setAppState,
 }) {
-  const prepared = prepFn({
-    situationGraph: resultSituationGraph,
-    targetNodeId,
-    contributions: focusedContributions ?? [],
-    findings,
-  });
-
-  if (!prepared?.turns?.length && !prepared?.eligibleCanonicalFindings?.length) {
-    return { success: false, stage: "preparation", reason: "no_episodic_content" };
-  }
-
   const serverResult = await episodeDoneServer({
     situationGraph: resultSituationGraph,
     targetNodeId,

lib/graph/schema.js

@@ -234,6 +234,7 @@ export const updateCaseEpisodeRequestSchema = z.object({
   situationGraph: situationGraphSchema,
   targetNodeId: z.string().min(1),
   contributions: z.any().array().optional(),
+  findings: z.any().array().optional(),
 }).passthrough();
 
 // ── Helpers ──────────────────────────────────────────

tests/ui/scenario-form-episode-done.test.jsx

@@ -9,17 +9,6 @@ const MOCK_SITUATION_GRAPH = {
 
 const DISTINCTIVE_GRAPH = { __distinctive_graph__: true };
 
-function makePreparedEpisode(overrides = {}) {
-  return {
-    situationGraph: MOCK_SITUATION_GRAPH,
-    targetNodeId: "n-q1",
-    turns: [{ contributionId: "contrib-0001", sequence: 1, question: "Q?", answer: "A?" }],
-    eligibleCanonicalFindings: [{ findingId: "f-1", proposition: "P1" }],
-    excludedFindingProvenance: [],
-    ...overrides,
-  };
-}
-
 function makeProposal() {
   return {
     addedNodes: [], updatedNodes: [{ nodeId: "n-q1", newStatus: "resolved" }],
@@ -44,17 +33,9 @@ describe("episode-done orchestration", () => {
     };
   }
 
-  function makePrepMock(returnValue) {
-    return vi.fn().mockReturnValue(returnValue ?? makePreparedEpisode());
-  }
-
-  it("1. Successful path order (prepare → synthesize)", async () => {
+  it("1. Successful path order (server → synthesize)", async () => {
     const order = [];
     const serverMock = makeServerMock();
-    const prepFn = makePrepMock().mockImplementation(() => {
-      order.push("prepare");
-      return makePreparedEpisode();
-    });
     serverMock.fn.mockImplementation(async (payload) => {
       order.push("server");
       return { success: true, updatedSituationGraph: DISTINCTIVE_GRAPH, proposal: makeProposal() };
@@ -65,7 +46,6 @@ describe("episode-done orchestration", () => {
       targetNodeId: "n-q1",
       focusedContributions: [{ id: "c-1" }],
       findings: [],
-      prepareCompletedEpisode: prepFn,
       episodeDoneServer: serverMock.fn,
       synthesizeFn: vi.fn().mockImplementation(async () => {
         order.push("synthesize");
@@ -74,9 +54,8 @@ describe("episode-done orchestration", () => {
       setResult: vi.fn(),
     });
 
-    expect(order[0]).toBe("prepare");
-    expect(order[1]).toBe("server");
-    expect(order[2]).toBe("synthesize");
+    expect(order[0]).toBe("server");
+    expect(order[1]).toBe("synthesize");
   });
 
   it("2. Client sends prepared episode source state to server", async () => {
@@ -89,7 +68,6 @@ describe("episode-done orchestration", () => {
       targetNodeId: "n-q1",
       focusedContributions: contributions,
       findings,
-      prepareCompletedEpisode: makePrepMock(),
       episodeDoneServer: serverMock.fn,
       synthesizeFn: vi.fn().mockReturnValue({ ok: true, data: {} }),
       setResult: vi.fn(),
@@ -110,7 +88,6 @@ describe("episode-done orchestration", () => {
       targetNodeId: "n-q1",
       focusedContributions: [],
       findings: [],
-      prepareCompletedEpisode: makePrepMock(),
       episodeDoneServer: serverMock.fn,
       synthesizeFn: vi.fn().mockReturnValue({ ok: true, data: {} }),
       setResult: vi.fn(),
@@ -136,7 +113,6 @@ describe("episode-done orchestration", () => {
       targetNodeId: "n-q1",
       focusedContributions: [],
       findings: [{ id: "f-1" }],
-      prepareCompletedEpisode: makePrepMock(),
       episodeDoneServer: serverMock.fn,
       synthesizeFn: (graph) => {
         synthesizedGraph = graph;
@@ -157,7 +133,6 @@ describe("episode-done orchestration", () => {
       targetNodeId: "n-q1",
       focusedContributions: [],
       findings: [],
-      prepareCompletedEpisode: makePrepMock(),
       episodeDoneServer: serverMock.fn,
       synthesizeFn: vi.fn(),
       setResult: vi.fn(),
@@ -177,7 +152,6 @@ describe("episode-done orchestration", () => {
       targetNodeId: "n-q1",
       focusedContributions: [],
       findings: [],
-      prepareCompletedEpisode: makePrepMock(),
       episodeDoneServer: serverMock.fn,
       synthesizeFn: vi.fn(),
       setResult,
@@ -195,7 +169,6 @@ describe("episode-done orchestration", () => {
       targetNodeId: "n-q1",
       focusedContributions: [],
       findings: [],
-      prepareCompletedEpisode: makePrepMock(),
       episodeDoneServer: serverMock.fn,
       synthesizeFn: vi.fn().mockReturnValue({ ok: false }),
       setResult,
@@ -216,7 +189,6 @@ describe("episode-done orchestration", () => {
       targetNodeId: "n-q1",
       focusedContributions: [],
       findings: [],
-      prepareCompletedEpisode: makePrepMock(),
       episodeDoneServer: serverMock.fn,
       synthesizeFn: vi.fn().mockReturnValue({ ok: true, data: {} }),
       setResult: vi.fn(),
@@ -234,7 +206,6 @@ describe("episode-done orchestration", () => {
       targetNodeId: "n-q1",
       focusedContributions: [],
       findings: [],
-      prepareCompletedEpisode: makePrepMock(),
       episodeDoneServer: serverMock.fn,
       synthesizeFn: vi.fn().mockReturnValue({ ok: true, data: {} }),
       setResult: vi.fn(),